Category Archives: CCNA

Using GNS3 WorkBench labs on real equipment

This request came up the other day: I just need some guided labs that I can do at home with my equipment. So I thought about how you could use GNS3 WorkBench exercises to do just that. Here is what … Continue reading

Posted in CCNA, dynamips, GNS3, GNS3 WorkBench | Tagged , , , , | 3 Comments

GNS3 WorkBench v8.6 is finally out

Executive Overview The next version of GNS3 WorkBench is out.  You can download it several forms: An entire Virtual Machine as a single blob (although split into two files 2.5G-3G in size) The same Virtual Machine as individual files (in case … Continue reading

Posted in CCNA, Certifications, Cisco, dynamips, GNS3, GNS3 WorkBench, ICND1, ICND2, Labs, Mac OS X, Microsoft, Routing, Wireshark | Tagged , | 7 Comments

GNS3 Network Simulation Guide

Finally – it’s published! I can now say I’m a “published author”.  Check out my new book, GNS3 Network Simulation Guide, at PACKT or Amazon. [Get 50% off til March 6 2016 by using THIS  LINK] As the blurb says, it will … Continue reading

Posted in blog, CCNA, Certifications, Cisco, dynamips, GNS3, GNS3 WorkBench, ICND1, ICND2, idle-max, Idle-PC, idle-sleep, idlemax, idlepc, idlesleep, Labs, vpcs, wordpress | Tagged , , , , | 10 Comments

Is EIGRP a Hybrid Routing Protocol or Advanced Distance Vector Routing Protocol?

Is EIGRP a Hybrid Routing Protocol or Advanced Distance Vector Routing Protocol? This question was discussed recently on the Cisco CCIE Routing and Switching Study Group website.  It took me years to work out that the problem with this question … Continue reading

Posted in CCNA, Cisco, EIGRP, ICND, ICND1, ICND2, OSPF, RIP, RIP, Routing | Tagged ,

IP Pie

One way of looking at how to subnet networks is the the IP Pie method. Dividing IP networks into subnets is as easy as pie.  All you need to do is remember one simple rule about how to cut the … Continue reading

Posted in CCNA, ICND, ICND1, ICND2, IP, SUbnetting

CCNA Certification Changes 2013 Summary

On 26 March 2013, Cisco announced new CCNA certifications.. Here is my interpretation of the changes. In a nutshell ICND1 is now considerably harder, absorbing much of the ICND2 content (IPv6, ACLs, VLANs and OSPF) while ICND2 seems to be … Continue reading

Posted in 802.1ad, 802.3ad, 802.3ax, ACL, CCNA, Certifications, Cisco, EIGRP, Etherchannel, ICND, ICND1, ICND2, IPv6, New CCNA certification, New Cisco certifications, opinion, OSPF, portfast, rant, rapid spanning-tree, RIP, Routing, spanning-tree, VLANs, VLSM, VTP, wifi, wireless network | 6 Comments

Is GNS3 going commercial? Surely Not!

I was firstly delighted, then dismayed by an email that appeared in my inbox this morning. It read: Hey GNS3, We are completely rebuilding GNS3 and want your help! In 2013, we are going to be building a brand new … Continue reading

Posted in CCNA, Cisco, GNS3, Labs, opinion, rant, Wireshark | Tagged , , , , , , , | 8 Comments

The Access VLAN is dead. Long live the Native VLAN.

I saw a question recently that asked “What is the point of the Native VLAN?” – and I could sense a degree of frustration in the question caused by Cisco’s weird way of describing untagged VLANs differently on different port … Continue reading

Posted in Access VLAN, CCNA, Cisco, Native VLAN, VTP | Tagged , , , , , | 4 Comments

CCNA – Now What?

I just answered a question on another forum and thought the answer might be worth posting here. I’ve just finished CCNA. Of course, the guys I’m talking to, they are motivating me to do their CCNP course as well. Do … Continue reading

Posted in CCNA, Cisco

NEVER use the “no exec-timeout” command!

When configuring a cisco router or switch, you may have been told that you can stop your console or telnet sessions from timing out by using the following configuration: line con 0 !(or line vty 0 4) no exec-timeout !DON’T … Continue reading

Posted in CCNA, Cisco, Labs, Router Configuration | 8 Comments